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      <a id="pyexec"></a>
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        <h2>
          <span class="refentrytitle">pyexec Opcodes</span>
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        <p>pyexec — Execute a script from a file at k-time or i-time (i suffix).
    </p>
      </div>
      <div class="refsect1">
        <a id="idp140416608"></a>
        <h2>Syntax</h2>
        <pre class="synopsis"><span class="command"><strong>pyexec</strong></span> "filename"</pre>
        <pre class="synopsis"><span class="command"><strong>pyexeci</strong></span> "filename"</pre>
        <pre class="synopsis"><span class="command"><strong>pylexec</strong></span> "filename"</pre>
        <pre class="synopsis"><span class="command"><strong>pylexeci</strong></span> "filename"</pre>
        <pre class="synopsis"><span class="command"><strong>pyexect</strong></span> ktrigger, "filename"</pre>
        <pre class="synopsis"><span class="command"><strong>plyexect</strong></span> ktrigger, "filename"</pre>
      </div>
      <div class="refsect1">
        <a id="idp140485920"></a>
        <h2>Description</h2>
        <p>Execute a script from a file at k-time or i-time (i
      suffix).</p>
        <p>This is not the same as calling the script with the <code class="literal">system()</code>
      call, since the code is executed by the embedded interpreter.</p>
        <p>The code contained in the specified file is executed in the
      global environment for opcodes pyexec and pyexeci and in the private
      environment for the opcodes pylexec and pylexeci.</p>
        <p>These opcodes perform no message passing. However, since the
      statement has access to the main namespace and the private namespace,
      it can interact with objects previously created in that
      environment.</p>
        <p>The "local" version of the <span class="emphasis"><em>pyexec</em></span> opcodes are useful when the
      code ran by different instances of an instrument should not
      interact.</p>
      </div>
      <div class="refsect1">
        <a id="idp140490592"></a>
        <h2>Example of the pyexec Opcode Group</h2>
        <div class="example">
          <a id="idp140491280"></a>
          <p class="title">
            <strong>Example 720. Orchestra (pyexec.orc)</strong>
          </p>
          <div class="example-contents">
            <pre class="programlisting">
<span class="ohdr">sr</span>=44100
<span class="ohdr">kr</span>=4410
<span class="ohdr">ksmps</span>=10
<span class="ohdr">nchnls</span>=1

<span class="comment">;If you're not running CsoundAC you need the following line</span>
<span class="comment">;to initialize the python interpreter</span>
<span class="comment">;pyinit</span>

        <span class="opc">pyruni</span> "import random"

        <span class="opc">pyexeci</span> "pyexec1.py"

<span class="oblock">instr</span> 1

        <span class="opc">pyexec</span>          "pyexec2.py"

        <span class="opc">pylexeci</span>        "pyexec3.py"
        <span class="opc">pylexec</span>         "pyexec4.py"

<span class="oblock">endin</span></pre>
          </div>
        </div>
        <br class="example-break" />
        <div class="example">
          <a id="idp140502448"></a>
          <p class="title">
            <strong>Example 721. Score (pyexec.sco)</strong>
          </p>
          <div class="example-contents">
            <pre class="programlisting">
<span class="stamnt">i</span>1 0 0.01
<span class="stamnt">i</span>1 0 0.01</pre>
          </div>
        </div>
        <br class="example-break" />
        <div class="example">
          <a id="idp140505280"></a>
          <p class="title">
            <strong>Example 722. The pyexec1.py Script</strong>
          </p>
          <div class="example-contents">
            <pre class="programlisting">
import time, os

print
print "Welcome to Csound!"

try:
    s = ', %s?' % os.getenv('USER')
except:
    s = '?'

print 'What sound do you want to hear today%s' % s
answer = raw_input()</pre>
          </div>
        </div>
        <br class="example-break" />
        <div class="example">
          <a id="idp140506944"></a>
          <p class="title">
            <strong>Example 723. The pyexec2.py script</strong>
          </p>
          <div class="example-contents">
            <pre class="programlisting">
print 'your answer is "%s"' % answer</pre>
          </div>
        </div>
        <br class="example-break" />
        <div class="example">
          <a id="idp140508448"></a>
          <p class="title">
            <strong>Example 724. The pyexec3.py script</strong>
          </p>
          <div class="example-contents">
            <pre class="programlisting">
message = 'a private random number: %f' % random.random()</pre>
          </div>
        </div>
        <br class="example-break" />
        <div class="example">
          <a id="idp140509984"></a>
          <p class="title">
            <strong>Example 725. The pyexec4.py script</strong>
          </p>
          <div class="example-contents">
            <pre class="programlisting">
print message</pre>
          </div>
        </div>
        <br class="example-break" />
        <p>If I run this example on my machine I get something like:</p>
        <pre class="screen">
Using ../../csound.xmg
Csound Version 4.19 (Mar 23 2002)
Embedded Python interpreter version 2.2
orchname:  pyexec.orc
scorename: pyexec.sco
sorting score ...
        ... done
orch compiler:
11 lines read
        instr   1       
Csound Version 4.19 (Mar 23 2002)
displays suppressed

Welcome to Csound!
What sound do you want to hear today, maurizio?</pre>
        <p>then I answer</p>
        <pre class="screen">
a sound</pre>
        <p>then Csound continues with the normal performance</p>
        <pre class="screen">
your answer is "a sound"
a private random number: 0.884006
new alloc for instr 1:
your answer is "a sound"
a private random number: 0.884006
your answer is "a sound"
a private random number: 0.889868
your answer is "a sound"
a private random number: 0.884006
your answer is "a sound"
a private random number: 0.889868
your answer is "a sound"
a private random number: 0.884006
your answer is "a sound"
...</pre>
        <p>In the same instrument a message is created in the private
namespace and printed, appearing different for each instance.</p>
      </div>
      <div class="refsect1">
        <a id="idp140516592"></a>
        <h2>Credits</h2>
        <p>Copyright (c) 2002 by Maurizio Umberto Puxeddu. All rights
      reserved. Portions copyright (c) 2004 and 2005 by Michael Gogins. This
      document has been updated Sunday 25 July 2004 and 1 February 2005 by
      Michael Gogins.</p>
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